NOTES – Editing

NOTES includes short papers and test files abridged from our workshops and consultations that address the most commonly asked questions.

Calibrating                    Printing                    Editing

Updated 27 May 2023.




Are you Seeing Correct Colour?

A simple outline of two basic evaluations anyone can undertake to help them understand why their prints do not match their screen and why Adobe Photoshop or Lightroom soft proofing does not work. Last updated 28 July 2019.

Notes on Reprographic Photography

A collection of recommendations and observations on the digitising of cultural and biological collections, including quality control, verification, camera alignment, lighting, diffraction, and depth of field considerations. Last updated 03 December 2018.

Capture One Archival Master Workflow

A comprehensive Capture One reprographic workflow, from controlling surface reflections to quality assurance, the minimal processing of a Preservation Asset, and subsequent production of Derivatives for specific destinations. Last updated 8 November 2022

Luminosity Mapping

The conversion of multi-channel images to a single greyscale channel is based on a luminosity formula, which in turn is based on a theory of perception. This paper examines Photoshop’s methodology and why desaturation and other conversion formulae do not always produce a satisfactory perceptual result. Last updated 24 May 2014.

Editing Out of Gamut Colours

A method for the local perceptual compression of Relative Colorimetric (B2A1) ‘out-of-gamut’ transformations using the L*a*b* colour model, as implemented in applications like Affinity Photo and analytical tools like ColorThink. Last updated 8 October 2020.

Converting to sRGB

An outline of the real world problem when converting from large gamut Matrix profiles to smaller gamut Matrix profiles, such as from ProPhoto RGB to sRGB, and our LUT based sRGB profile’s perceptual gamut compression aesthetic and workflow solutions. Last updated 21 June 2020.

B&W Contrast Filters

The calculation of digital equivalents to Kodak’s Wratten Filters and their implementation in preparing digital BW fine prints. Last updated 13 June 2020.

Toning BW Digital Images

A luminosity masking method for toning digital images so as to emulate the ‘look, feel and presence’ of toned silver gelatin fine prints. Last updated 03 August 2015.

Matching Colours to Reference

LUT based colour correction is image independent so almost any colour palette or image can be sampled and used as the basis for the colour rendering of other images. Last updated 13 October 2020.

Resolving Encoding Errors

A brief analysis of Adobe Photoshop’s colour encoding issues and workarounds to resolve the colorimetric confusion and frustration when commonsense fails us. Last updated 28 June 2021.